5-(2,2-DIMETHYL-CYCLOPRODYL)-3-METHYL-PEN-2-ENENITRILE AS FRAGRANCE AND FLAVOUR
申请人:Givaudan SA
公开号:EP1828108A1
公开(公告)日:2007-09-05
Compound
申请人:Schroder Fridtjof
公开号:US20080103085A1
公开(公告)日:2008-05-01
The compound 5-(2,2-dimethyl-cyclopropyl)-3-methyl-pent-2-enenitrile and its use in fragrance or flavour applications.
Cyclopropanation Process
申请人:Schroder Fridtjof
公开号:US20080275256A1
公开(公告)日:2008-11-06
A process for the cyclopropanation of a substituted alkene, comprising the reaction of the alkene with a carbenoide, generated from dibromomethane and a tri-(C
2
-C
8
)-alkyl aluminium compound, in the presence of a catalytic amount of a metal compound selected from the group consisting of Lewis acids, metallocenes and metal carbonyl complexes. The process advantageously uses transition metal compounds as catalysts and the dibromomethane can be recovered.
The process is especially useful for the preparation of ingredients for the flavour and fragrance industry.